LBA-ECO CD-36 South American Land Data Assimilation System Atmospheric Forcing Data

This data set provides South American Land Data Assimilation System (SALDAS) forcing data including atmospheric fields necessary for land surface modeling for South America which are derived by combining modeled and observation based sources.

The forcing data cover the entire continent of South America at 0.125 degree resolution and are built around the model-calculated values of air temperature, wind speed and specific humidity at two meters, surface pressure, downward shortwave and longwave surface radiation, and precipitation from the South American Regional Reanalysis (SARR). These SARR data (Aravequia et al. 2007), which were released in 2006 by INPE/CPTEC, are a medium-term, dynamically consistent, high-resolution (0.125 degree), high-frequency, atmospheric dataset covering South America. The forcing data are available at a 3-hourly time step for a 5-year period from 2000 to 2004.

There are 60 monthly *.zip files with each zipped file containing ~240 3-hourly time step data files for that particular month in NetCDF format. Each zipped file is approximately one GB in size.

本数据集提供南美陆面数据同化系统（South American Land Data Assimilation System, SALDAS）强迫场数据，涵盖南美陆面模拟所需的全部大气场变量，数据通过融合模式模拟结果与观测衍生数据源构建而成。

该强迫场数据覆盖南美全大陆，空间分辨率为0.125度，核心变量源自南美区域再分析（South American Regional Reanalysis, SARR）的模式计算结果，包括2米高度处的气温、风速、比湿、地表气压、下行短波与长波地表辐射以及降水量。该SARR数据由Aravequia等人于2007年发表，由INPE/CPTEC于2006年发布，是一套覆盖南美区域的中期、动力一致性、高分辨率（0.125度）、高频大气数据集。本强迫场数据的时间步长为3小时，涵盖2000年至2004年共5年的时段。

数据集包含60个月度*.zip压缩包，每个压缩包内含对应月份的约240个3小时步长的NetCDF格式数据文件，单个压缩包体积约为1GB。